You still need to actually aim though, so it's not impossible to avoid dieing
True, and I don't think hitscan is too much of a problem in standard MP. The bullet velocity for the rifles is so high that on most maps the drop is minimal and the travel time is very short. Give it a few weeks and you won't see it all that much in standard MP anymore as people will have unlocked most attachements to use in WZ.
It is a problem in WZ though. Its OHK to the head out to its maximum range, and has more mobility than the HDR or AX50 whilst being much easier to headshot at any range. The only downside to the SPR is it cannot hit anything beyond about 400m or so, which is not a range you'll be making many engagements at anyway.